-50.92% is the change from 489 to 240
Calculation steps:
[( 240 - 489 ) ÷ 489] x 100 = -50.92%
Formula
Percentage change = [(240 - 489) / 489] x 100
Subtract the new number by the original number
240 - 489 = -249
-249 ÷ 489 = -0.50920245398773
-0.50920245398773 x 100 = -50.92%